Question

When sodium is dropped in small amount of water it catches fire. Which one of the following burns in the process?

• A. Na
• B. $H_{2}O$
• C. $H_{2}$
• D. NaOH

Answer 1

Answer: (C)

$H_{2}$

Answer 2

: $H_{2}$ gas produced during the reaction burns.

$2Na + 2H_{2}O \rightarrow 2NaOH + H_{2}$